STRUCTURE OF THE EARTH

Structure of the earth write with picture

internal structure of the earth diagram
structure of the earth diagram


STRUCTURE OF THE EARTH
Earth is mainly made up of 3 parts. Which is called the Crust, the Mantle and the Core. The three parts have their own specialties. Geological scientists have given interesting information by studying this fact in a special way.

The Crust
This is the outermost solid part of the earth. In which all living beings live. It is the weakest and brittle part of the earth. The thickness of the crust in the oceans is less than that of the continents. The crust thickness can be 0 to 100 km. But sometimes its thickness varies. For example, it has a thickness of up to 5 kilometers at the bottom of the sea. Its thickness between the same continents can range from 30 to 40 kilometers. And its thickness between the mountain range can also be 70 to 100 kilometers.
Its is made up of heavier rocks having density of 3g/cm3. this type of rock found in the oceanic crust is basalt. the mean density of material in oceanic crust in 2.7g/cm3.

The Mental
It shows the structure of the central part of the earth. The part of earth below the crust is called mantle. The mantle extends from Moho's discontinuity to deapth of 2900 km.
Asthenosphere - The upper part of the mantle is called the Asthenosphere. Its extension is considered to be 400 kilometers. During the volcanic eruption, the magma reaches the ground. Its main center and source is called Asthenosphere. Its has a density higher than the crust's 3.4g/cm3.
Lithosphere- The upper part of the earth's mantle and mantle together form the lithosphere. Its thickness can be from 10 kilometers to 200 kilometers. Mantle is found in liquid form or semi-solid state.
The lower mantle extends beyond the asthonosphere. Its is in solid state.

The Core
The inner most part of the Earth is divied in the two part. liquid core and solid core. This part is boundary is located a depth of 2900 km above the Earth's surface to the mantle and liquid core. But the same liquid core and solid core have a  boundary of 5100 km. The fluid in the solid core a change in solid state due to excessive pressure and  excessive heat. The surface of the Earth is about 6300 km from the middle part of the solid core. The density of the liquid core is 5 g / cm 3. But the density of the same solid core is 13 g / cm 3. The core consists mainly of nickel and iron. For this reason it is called "NIFE"

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